为了减少空气污染,北京市积极推广使用清洁燃料。目前汽车使用的

为了减少空气污染,北京市积极推广使用清洁燃料。目前汽车使用的清洁燃料有两类,一类是液化石油气(LPG),另一类是压缩天然气(CNG)。压缩天然气的主要成分为(   

A.C2H5OH            B.CH4             C.CO             D.H2

答案

思路解析:天然气的主要成分是甲烷,压缩天然气的主要成分也是甲烷。

答案:B

相关题目

某有机化合物结构如下,分析其结构并完成下列问题:(1)写
某有机化合物结构如下,分析其结构并完成下列问题:(1)写出其分子式_________。(2)其中含有_________个不饱和碳原子,分子中有_________种双键。(3)分子中
— What are you looking for, James?—____football. It’s time for me to play
— What are you looking for, James?—____football. It’s time for me to play       football with my friends.   A.The; a       B.A; the      C. The; /     D. / ; /
 — I don’t think we can find a new day to work out the problem.  — But
 — I don’t think we can find a new day to work out the problem.  — But we’d better not        .    A. end up                     B. hand out          
_____, John returned to school from his hometown. A.The summer vacation being
_____, John returned to school from his hometown. A.The summer vacation being over        B.The summer vacation is over C.Because the summer vacation over       D.After the sum
某学生用化学知识解决生活中的问题,下列家庭小实验不合
某学生用化学知识解决生活中的问题,下列家庭小实验不合理的是 A.用食醋除去暖水瓶中的薄层水垢 B.用米汤检验食盐是否为含碘盐 C.用纯碱(Na2CO
As director of the company,I can’t          three weeks away from w
As director of the company,I can’t          three weeks away from work. A.carry           B.cost        C.pay         D.afford  
下列运算正确的是( ▲ )A.;B.(为实数);C.;D..
下列运算正确的是( ▲ )A.;B.(为实数);C.;D..
The mother forbids     noise in our study,but she doesn’t forbid us____
The mother forbids     noise in our study,but she doesn’t forbid us____ a discussion. A、to make;to have    B、making;to have   C、making;having     D、make;having

最新题目